get.used.data {provGraphR}

Get data used and created by a statement

Description

get.used.data returns the data nodes that this procedure node uses

A procedure node represents a top-level statement. The data created by the statement can be the variables set, output files written to, plots created, error or warning messages created.

Usage

get.used.data(adj.graph, proc.node.id)

get.created.data(adj.graph, proc.node.id)

get.updated.data(adj.graph, proc.node.id)

Arguments

adj.graph

the adjacency matrix

proc.node.id

the id of the procedure node.

Details

A procedure node represents a top-level statement. The data used by the statement are the variables used in expressions or input files or URLs read from.

Value

the ids of the data nodes that are used by the specified procedure node. Returns NULL if there is no node with the given id, the id is not for a procedure node, or the procedure node does not use any data nodes. The last case can occur, for example, if the procedure node represents a statement where a constant is assigned to a variable.

the ids of the data nodes that are created by the specified procedure node. Returns NULL if there is no node with the given id, the id is not for a procedure node, or the procedure node does not create any data nodes. The last case can occur, for example, if the procedure node represents a statement where the statement prints a constant string.

the ids of the data nodes that are updated by the specified procedure node. Returns NULL if there is no node with the given id, the id is not for a procedure node, or the procedure node does not update any data.

See Also

create.graph

create.graph

create.graph

Examples

adj.graph <- create.graph(system.file("testdata", "basic.json", package = "provGraphR"))
get.used.data (adj.graph, "p11")

get.created.data (adj.graph, "p11")

get.updated.data (adj.graph, "p5")